It is well known and appreciated that many patients, especially those with advanced PD, will require frequent doses in excess of 800 mg a day.
Simpler, less frequent dosing regimens result in better compliance [ 37].
Dose escalation from 5 days to 7 days, however, resulted in increased toxicity and more frequent dose modifications in both chemotherapy and radiotherapy particularly in the second half of the treatment schedule.
This finding is consistent with those of earlier reports on TRD in which a once-daily dosing interval proved successful in controlling diarrhea in dogs with recurrent diarrhea [ 5],[ 6],[ 15], and shows that a more frequent dosing interval is unnecessary in the treatment of diarrhea relapses in TRD dogs.
This has led to clinicians recommending frequent dosing, which has resulted in noncompliance by patients and decreased cost effectiveness.
Their advantages over telaprevir/boceprevir are improved pharmacokinetics with the capacity for less frequent dosing, broader genotypic activity in some cases and, most importantly, a lower frequency of side-effects (Lange & Zeuzem, 2012).
Assessing adherence in the daily clinical setting is challenging more than in clinical studies given less allocated resources, variable objective standards, frequent dosing modifications and medication provision in long term residence or nursing facilities [ 10].
22, 23 When compared to sildenafil, the less frequent dosing of tadalafil is advantageous in terms of patient convenience and adherence.
Compliance to such frequent dosing regimens is however poor in ADHD patients due to forgetfulness, inattentiveness and self-organisation problems, leading to daily instability by frequent rebound symptoms and ineffective treatment [ 148, 289- 291].
